:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#15362d;background:#f3f6f3;line-height:1.65}*{box-sizing:border-box}body{margin:0}header,footer{display:flex;gap:24px;justify-content:space-between;align-items:center;padding:20px max(20px,calc((100vw - 1080px)/2));background:#fff;border-bottom:1px solid #d5e2db}nav{display:flex;gap:20px}a{color:#176243;text-underline-offset:3px}main{max-width:1080px;margin:auto;padding:32px 20px 64px}.hero{max-width:850px;padding:20px 0 36px}h1{font-size:clamp(2rem,4vw,3.3rem);line-height:1.15;letter-spacing:-.03em}h2{line-height:1.3;font-size:1.5rem}.eyebrow{font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;color:#587566}.card{background:#fff;border:1px solid #d5e2db;border-radius:18px;padding:28px;margin:22px 0}label{display:block;font-weight:650;margin-top:18px}textarea,input{font:inherit;width:100%;border:1px solid #9fb7aa;border-radius:8px;padding:12px;margin:8px 0;min-width:0}textarea{font-family:ui-monospace,monospace;font-size:.9rem;line-height:1.7}button,.invoice-tool-cta{display:inline-block;border:0;border-radius:8px;background:#185d40;color:#fff;padding:12px 18px;font:inherit;font-weight:650;cursor:pointer;margin:10px 8px 10px 0;text-decoration:none}.secondary{background:#edf4ef;color:#185d40}button:disabled{opacity:.5;cursor:default}.muted{color:#546c60;font-size:.94rem}.note{background:#edf4ef;padding:16px;border-radius:8px}.table-wrap{overflow:auto;width:100%;margin:18px 0}table{width:100%;border-collapse:collapse;font-size:.93rem}th,td{text-align:left;vertical-align:top;border-bottom:1px solid #d5e2db;padding:12px;overflow-wrap:anywhere;min-width:90px}th{background:#edf4ef}.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}.related a{padding:12px;background:#f4f7f4;border-radius:8px}details{padding:16px 0;border-top:1px solid #d5e2db}summary{cursor:pointer;font-weight:650}pre{white-space:pre-wrap;overflow-wrap:anywhere}li{margin:10px 0}:focus-visible{outline:3px solid #b87e21;outline-offset:3px}@media(max-width:600px){header,footer{padding:16px;gap:12px;flex-wrap:wrap}main{padding:20px 14px}.card{padding:20px 16px}h1{font-size:2.15rem}nav{gap:14px}.related{grid-template-columns:1fr}}